Printing-telegraph



H. PFANNEN STIEHL AND E. F. WATSON.

PRINTING TELEGRAPH.

APPLICATION FILED JAN. 23, 1919.

Patented Dec.13,1 921.

Edward E Wafsofl.

cameo stares r ors ce.

HARRY PFANNENSTIEHL, OF EAST ORANGE, NEW JERSEY, AND EDWARD F. WATSON,

OF NEW YORK, N. Y., ASSIGNORS TO WESTERN ELECTRIC COMPANY, INCORPO- RATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

iRINTING-TELEGRAPH.

Specification of Letters Patent.

Patented Dec. 13, 1921.

Application filed January 23, 1919. Serial No. 272,615.

To all whom it may concern:

Be it known that we, HARRY PFANNEN- STIEHL and EDWARD F. WATSON, citizens of the United States, residing at East Orange, in the county of Essex and State of New Jersey, and at New York, in the county of New York and State of New York, respectively, have invented certain new and useful Improvements in' Printing-Telegraphs, of which the following is a full, clear, concise, and exact description.

This invention relates to printing telegraphs andparticularly'to improvements in printing telegraph receiving apparatus. The main purpose of this invention is to provide means responsive to line current impulses for operating the line feed and ribbon feed mechanisms jointly.

The invention is disclosed in the accompanying drawings as applied to a telegraph receiving printer comprising selection mechanism, a stationary paper platen and a type carriage adapted to be moved transversely of the printer. The selecting mechanism consists of a plurality of stationary selecting magnets and a corresponding number of horizontal selecting bars controlled by said magnets. The selecting bars extend transversely of the printer and are adapted to be moved in a direction transversely of their length for selection purposes.

A plurality of notched code bars or per mutation bars are provided and the arrangement of these bars with respect to the selecting bars is such that when any combination is set up by the selecting magnets, only one of the code bars is permitted to move forward and mesh with the selecting bars.

The above and other objects of this invention will be more fully set forth in the following description and claims, and will be more readily understood by reference to the accompanying drawing which shows an end view of a telegraph receiving printer with certain parts in cross-section and with certain portions of the frame and mechanism eliminated in order to simplify the drawings and to more clearly illustrate the invention.

The mechanism is operated preferably by a five unit code with an additional impulse following each group of'five selecting impulses for startin the mechanism in operation. The selecting impulses may consist of current of different polarity, different strength or the impulses may be formed by slmply opening and closing the line circuit as in Morse operation. The impulses may arrive over a line circuit from a distant station and may be relayed or distributed to the selecting magnets by means of a Baudot distributer or any of thewell known distributing means.

The invention herein illustrated is an improvement on the system disclosed in an application of Harry Pfannenstiehl, Serial No. 173,546, filed J une 8, 1917, and since the above-mentioned copending application describes in detail the various operations of a receiving printer, it is thought to be unnecessary to show a complete structure of a receiving printer but only to show so much of the apparatus as is essential to a clear understanding of the invention.

Referring to the accompanying drawings the type carriage 10 is of a form so well known as to require no detailed description.

The type carriage carrying theusual characters to be printed is supported by a portion of the frame structure 11, and a rotatable shaft 12. The selecting mechanism consists of five selecting magnets and live corresponding selecting bars 13, 14, 15, 16 and 17. Only three of the selecting magnets 18, 20 and 22 are shown. The selecting bars 13 to 17 inclusive, extend entirely across the printer at right angles to the permutation bars 23. Each of the selecting magnets is provided with an armature 24, 25, 2'6, 27 and 28 and extending from the armatures of the selecting magnets to the selecting bars are five latches 29, 30, 31, 32 and 33. The latches normally extend beneath the selecting bars and are adapted to be withdrawn therefrom when the selecting magnets are energized for selecting purposes. Any suitable stopping devices and restoring mechanism may be provided for the selecting bars. For a further detailed description of the selecting mechanism reference may be made to a copending application of Harry Pfannenstiehl and Erwin P. Bancroft, Serial No. 195,712, filed October 10, 1917 As previously mentioned, the code bars are arranged so that when a selection is received and the selecting bars are selectively actuated, one and only one of the code bars will be permitted to move forward astride the selecting bars. The code bars 23 are normally heldin the position shown by means of a universalbar 34 which is associated with the code bars and extends in front of downwardly extending arms 35 carried by the code .bars. The universal bar 34 is supported by a downwardly extending arm 36 of a bell crank lever 37, the other arm of which extends beneath a universal striking bar 39. The striker bar 39 is carried by an arm 40 which is pivotally mounted on a rod 41,which rod may be journaled in the frame of the machine or supported in any suitable manner. Pivotally supported on the rod 41 and adjacent the arm 40 is an upwardly extending 1 arm 42 connected to a reciprocatory member 43 which is reciprocated by a cam 44 carried by the camshaft 45. Power for operating the cam shaft maybe supplied as fully disclosed in the above-mentioned copending application Serial N 0. 173,546. The striker bar 39 is normally held in the position shown by spring member 46, one end of which is connected to an extension'of the bracket arm 40 while the other end of the spring is connected to the reciprocating arm 43. On'the 1 extension of the bracket arm 40 is secured an adju'stablepmember 47.. The arm 42 carries 1 amember 48 which is normally held in engagement with the adjustable member 47 by. aspring' 49 and maybe held away fromthe member 47 whenever it is desired to perform 7 some operation by means of' the cam shaft .which does not require actuation of the striker bar 39. It will readily be seen that when the cam shaft is rotated, the cam 44 i will move the arm 43 forward and by means of-the connecting member 48 coiiperating with the adjustable member 47, the striker bar 39' will be forced downward and by acting on the extension 38 of bell crank lever 37 the universal bar 34 will be moved forward away from. the extensions 35 of the permutation bars. All of the permutation bars are normally held clear of the selecting bars by the universal bar 34 and when the bar 34is moved forward all of the code bars, due to the action of suitable springs 50, will also moveforwardly slightly but only the selected code bar will be permitted to move forward astride the selecting bars; The permutation or code bars in moving forward may control members connected to the type bars of the printer or they may be employed for performing various auxiliary operations such as is essential in the operation of a receiving printer. In accordance with ap+ plicants invention a plurality of the auxiliary operations essential in a receiving printer, such as'rotating the paper platen to feed the paper for spacing between lines and for operating a ribbon feeding mechanism to present a fresh inking surface for printing, has been combinedso that both operations may be performed jointly or simultaneously.

Since in the preferred embodiment herein disclosed the paper platen is stationary and the type carriage movable, there is provided no common printing point. Consequently, it is not necessary to feed the inking ribbon as often or as frequently as if all characters were printed at a common or particular position. Therefore, applicants invention is di-. rected to the' provision of means whereby the on the rear thereof. The code bar when selected. is permitted to move forwardunderv the action of a suitable spring 50 and by means of the extension 51 a member 53'is engaged and moved forward. The opposite end of themember 53 is connected-to a rocker arm 54 which is pivoted at 55. The opposite end of the rocker arm 54 isnormally heldagainst a member 56 by means of a spring member 57 which tends to hold the rocker 1 arm in the position shown.; Spring con-.

tacts 58 which control the circuit of the magnet 52, are normally opened but are adapted to be closed by the rocker arm 54 when the special code bar 23 is selected. The closure of contacts 58 completes an ener izing circuit for magnet52from grounded attery 90 to ground at 91 henthe arm 54 is rocked toclose-contacts 58, member 56 is forced upward by means of spring member 59 so that it engages the offset portion 60 of thearm 54 and thereby holds the arm inits actuated position to maintain the contacts 58 closed until the magnet 52 has completed its opera tion.

trolling the o eration of the line feeding mechanism an arms 63 and 64 controlling the operation of the ribbon feeding mechanism. The ribbon mechanism is shown comprising a ribbon spool 66 supported by a rotatable shaft 67 which is supported in any suitable manner in the frame'of the machine. The ribbon 68 is fed from a ribbon (not shown) through suitable ribbon guidw ing members 69 in front of the printing elements onto a similar ribbon spool 66 at the opposite end of the printer. On the end of the shaft 67 is a pinion or bevel gear 70. Mounted at right angles to the shaft 67 is a rotatable shaft 71 which alsocarries a bevel gear 72 adapted to mesh with the gear 70. Loosely mounted on the shaft 71 is an arm '73 The magnet 52 is provided with a plunger spool carrying a pin 74 and a pawl 75 which pawl is adapted to engage the teeth of the ratchet wheel 76. The arm 64 when actuated, engages the pin 74 carried by arm 73 and thereby effects rotation ofthe bevel gear 7 2' through the instrumentality of the ratchet 76 and pawl 7 5. Actuation of the ratchet7 6 impart s'rotation to the ribbon spool 66 and thereby advances the ribbon a predetermined amount. The ratchet 76 is also provided with a holding pawl 77 to prevent backward rotation of the ratchet.

The paper platen 78 is provided with a ratchet wheel 79 which is adapted to be actuated for the purpose of rotating the paper platen and feeding the paper 80 forward. The paper 80 may be drawn from a roll 81 over a suitable guide roller 82 and around the platen 78 in the usual manner. Supported in the frame 'of the machine in any desired manner is a slidable bar 83 carrying an actuating pawl 84. The pawl 84 is adapted to engage the teeth of the ratchet wheel 7 9 and turn the platen a predetermined amount whenever ,'the bar 83 is actuated. For this purpose the sliding bar 83 is provided with a pin or an extension 85 on the end thereof, which extension is adapted to be engaged by the end of the arm 62 whenever the said arm is rotated about its pivotal bearing in a clockwise direction. Thus it will be seen that whenever magnet 5211s energizedthe paper platen and'the ribbon spool will be rotated simultaneously, thereby controlling the spacing between lines and the advancing of the inking ribbon in one operation.

A lever 86 carrying a 1n or cam surface 87 is provided for determlning or regulating the extent of rotation of the Eaten for each actuation of the magnet 52. y moving the lever 86 and pin 87 the actuating pawl 84 may be caused to rotate the platen the extent of one, two or more teeth.

What is claimed is:

1. In a telegraph receiving printer, a paper platen, rlbbon feeding mechanism, mechanism for rotating said platen for line spacing, selecting mechanism comprising a plurality of selecting magnets,.permutation means controlled thereby, an electromagnet energized upon the positioning of said permutation means in a predetermined manner, and means responsive to the energization of said electromagnet for operating said ribron feeding and line spacing mechanisms simulta eously.

9a a telegraph receiving printer, a aper laten, ribbon feeding mechanism,

'echamsm for rotating said platen for line spacing, selecting mechanism comprising a plurality of selecting magnets, permutation means controlled thereby,

an electromagnet energized upon the positioning of said perthe simultaneous operation of said ribbon feeding and line spacing mechanisms.

3. In a telegraph receiving printer, a revoluble platen, ribbon feeding mechanism, selecting mechanism comprising a plurality o selecting magnets, permutation means controlled thereby, an operating magnet, an energizing circuit therefor, mechanism controlled by said permutation means for clos ing the energizing circuit through said magnet, and means responsive to the energization of said magnet for rotating said platen and for operating said ribbon feeding mechanlsm. x a 4. In a telegraph receiver, a paper platen, ratchet mechanism for rotating said platen for line spacing, ribbon feeding mechanism, a ratchet therefor, and a magnet for operating said ratchet mechanism jointly.

5. In a telegraph receiver, a paper platen, mechanism for rotating said platen for line spacing, a ribbon feeding mechanism, an electromagnet, an energizing circuit therefor, means for closing said energizing c1rcuit, means for holding said circuit closed, and means responsive to the energization of said magnet for operating said line spaclng and ribbon feeding mechanisms and for releasing said holding means.

6. In a telegraph receiver, a paper platen, mechanism for rotating said platen for line spacing, a. ribbon feeding mechanism, an'

electromagnet, an energizing circuit therefor, means controlled by line current impulses for closing said energizing circuit, means for holding said circuit closed, and means responsive to the energization of said magnet for operating said line spacing and ribbon feeding mechanisms simultaneously .and for releasing said holding means.

7. In a telegraph receiver, a revoluble platen, ribbon feeding mechanism, selecting mechanism comprising a plurality of selecting magnets, permutation means controlled thereby, an operating magnet, a circuit therefor, means controlled by said permutation means for closing said circuit, means for holding said circuit closed, and means responsive to the energization of said magnet for rotating said platen and operating said ribbon feeding mechanism simultaneously and for releasing said circuit holding means.

In witness whereof, we hereunto subscribe our names, this 18th day of January. A. D. 1919.

HARRY PFANNENSTIEHL. EDWARD F. WATSON. 

